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This example displays a static yellow circle with a black outline centered in an SVG canvas, demonstrating a minimal React and D3 setup. The HTML file includes React 17 and D3 v7 via CDN, while the JavaScript imports React, ReactDOM, and the `arc` function from D3, though the `App` component remains empty. The SVG is defined directly in the HTML with hardcoded dimensions (960×500) and circle properties, showing a basic structure without dynamic data or interactivity.